Consider three $8-$bit numbers X$,$ NUM$1$ and NUM$2$ are stored in internal data RAM locations $20$H$,21$H and $22$H respectively.

Write an $8051-$assembly language program to compute the following

if X is equal to $0$; then LSB of NUM$1($AND$)$ LSB of NUM$2$

if X is equal to $1$; then MSB of NUM$1($OR$)$ MSB of NUM$2$

if X is equal to $2$; then complement MSB of NUM$1$

else do nothing store the bit results in RES, where RES is MSB of $23$ H locations.